package zjh_20230311;

public class exam18 {
    public static void main(String[] args) {
        Long a = 100L, b = 100L, x = 1000L, y = 1000L;
//        boolean b1 = a == b;
        boolean b2 = a.equals(b);
//        boolean b3 = x == y;
        boolean b4 = x.equals(y);

    }
}
